<template>
  <div class="app-container">
    <!--查询表单-->
    <el-form :inline="true" class="demo-form-inline">
      <el-form-item>
        <el-input v-model="courseQuery.title" placeholder="名称"/>
      </el-form-item>
      <el-form-item>
        <el-select v-model="courseQuery.status" clearable placeholder="状态" >
          <!-- <el-option :value="Normal" label="已发布"/>
          <el-option :value="Draft" label="未发布"/> -->
          <el-option
            v-for="item in options"
            :key="item.value"
            :label="item.label"
            :value="item.value">
          </el-option>
        </el-select>
      </el-form-item>
      <el-button type="primary" icon="el-icon-search" @click="getList()">查询</el-button>
      <el-button type="default" @click="resetData()">清空</el-button>
    </el-form>

      <!-- 表格 -->
    <el-table
      :data="list"
      border
      fit
      highlight-current-row
    >
      <el-table-column label="序号" width="70" align="center">
        <template slot-scope="scope">
          {{ (page - 1) * size + scope.$index + 1 }}
        </template>
      </el-table-column>
      <el-table-column prop="title" label="课程名称" align="center"/>
      <el-table-column label="课程状态" align="center">
        <template slot-scope="scope">
          {{ scope.row.status === 'Normal' ? "已发布" : "未发布" }}
        </template>
      </el-table-column>
      <el-table-column prop="lessonNum" label="课时数"  align="center" />
      <el-table-column prop="gmtCreate" label="添加时间" align="center"/>
      <el-table-column prop="viewCount" label="浏览数量" align="center"/>
      <el-table-column label="操作" width="300" align="center">
        <template slot-scope="scope">
          <router-link :to="'/course/update/' + scope.row.id">
            <el-button type="primary" size="mini" icon="el-icon-edit">
                编辑课程基本信息
            </el-button>
          </router-link>
          <br>
          <router-link :to="'/course/update/' + scope.row.id">
            <el-button type="primary" size="mini" icon="el-icon-edit">
                编辑课程大纲
            </el-button>
          </router-link>
          <br>
          <el-button
            type="danger"
            size="mini"
            icon="el-icon-delete"
            @click="deleteById(scope.row.id)"
            >删除</el-button
          >
        </template>
      </el-table-column>
    </el-table>

   <!-- 分页 -->
    <el-pagination
      :current-page="page"
      :page-size="size"
      :total="total"
      style="padding: 30px 0; text-align: center;"
      layout="total, prev, pager, next, jumper"
      @current-change="getList"
    />
  </div>
</template>

<script>
import course from '@/api/edu/course'
export default {
  data(){
    return{
      list: null, //查询之后接口返回集合
      page: 1, // 当前页
      size: 5, //每页记录数
      total: 0, //总记录数
      courseQuery: {}, //条件封装对象
      options:[
        {
          value: 'Normal',
          label: '已发布'
        }, 
        {
          value: 'Draft',
          label: '未发布'
        }
      ],
    }
  },
  created(){
    // 在页面渲染之前执行，一般调用method方法
    //调用
    this.getList()
  },
  methods:{
    //创建具体的方法，调用teacher.js定义的方法
    getList(page = 1){
        this.page = page
        course.getCourseList(this.page, this.size, this.courseQuery)
            .then((success) => {
                //请求成功
                this.list = success.data.rows
                this.total = success.data.total
            })
    },
    resetData(){
        //清空表单数据
        this.courseQuery = {}
        //查询所有
        this.getList()
    },
    deleteById(id){
        this.$confirm('此操作将永久删除课程, 是否继续?', '提示', {
            confirmButtonText: '确定',
            cancelButtonText: '取消',
            type: 'warning'
            }).then(() => {
                course.deleteById(id)
                    .then(success =>{
                        this.$message({
                        type: 'success',
                        message: '删除成功!'
                    });
                    this.getList()
                    })
            })
    }
  }
}
</script>